689804552306 has 4 divisors (see below), whose sum is σ = 1034706828462. Its totient is φ = 344902276152.

The previous prime is 689804552299. The next prime is 689804552309. The reversal of 689804552306 is 603255408986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 689466176281 + 338376025 = 830341^2 + 18395^2 .

It is not an unprimeable number, because it can be changed into a prime (689804552309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172451138075 + ... + 172451138078.

Almost surely, 2^689804552306 is an apocalyptic number.

689804552306 is a deficient number, since it is larger than the sum of its proper divisors (344902276156).

689804552306 is a wasteful number, since it uses less digits than its factorization.

689804552306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344902276155.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 689804552306 in words is "six hundred eighty-nine billion, eight hundred four million, five hundred fifty-two thousand, three hundred six".